/* ============================================================================
   TUTATIX PRO – LANDING PAGE
   Design System: 60-30-10 Color Strategy (Pascal Feyh / Mehr Geschäft)
   ============================================================================ */

/* ---------- GOOGLE FONTS ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ---------- CSS CUSTOM PROPERTIES ---------- */
:root {
  /* 60% — Background & Neutrals */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --bg-tertiary: #E9ECEF;

  /* 30% — Brand & Trust */
  --brand-primary: #003366;
  --brand-secondary: #004080;
  --text-primary: #1A1A1A;
  --text-secondary: #4A5568;
  --text-muted: #6C757D;

  /* 10% — CTA Accent (Signal Yellow) */
  --cta-primary: #FFD700;
  --cta-hover: #FFC107;
  --cta-text: #000000;

  /* Semantic */
  --success: #28A745;
  --accent-blue: #007BFF;
  --danger: #DC3545;
  --warning: #FD7E14;

  /* Overlay */
  --overlay-bg: rgba(0, 51, 102, 0.65);
  --overlay-blur: 8px;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --border-radius: 8px;
  --border-radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-cta: 0 4px 12px rgba(255, 215, 0, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
}

/* ---------- RESET ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.overlay-active {
  overflow: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--brand-secondary);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* ---------- TYPOGRAPHY ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--brand-primary);
}

h1 {
  font-size: clamp(1.75rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 600;
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

.text-center { text-align: center; }
.text-muted  { color: var(--text-muted); }

/* ---------- LAYOUT ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--container-narrow);
}

section {
  padding: var(--space-3xl) 0;
}

section:nth-child(even) {
  background: var(--bg-secondary);
}

/* ---------- UTILITY CLASSES ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}